kbuskill
***CAUTION*** I do my own stunts!
Denalis and Escalades should have very similar ride characteristics.
The integrated brake controller, while nice, is not that big of a deal. Sure it's nice to have one built in, but a Tekonsha P3 will work just fine, and wiring it in is a breeze. I'm comfortable with a Tekonsha controlling my 8600-lb trailer.
More importantly would be the coolers. For towing, you want to have the auxiliary coolers - transmission and engine oil. Look up those RPO codes so you know what to look for when you see them, or ask the seller to send you a picture of the RPO code sticker in the glove box.
My Sierra Denali has the following codes:
K5L EQUIPMENT ENHANCED COOLING PACKAGE ENHANCED COOLING PKG(K5L)
KC4 COOLING SYSTEM,ENGINE OIL ENG OIL CLG(KC4)
KNP COOLING SYSTEM,TRANSMISSION,HEAVY DUTY HVY DUTY TRANS CLG SYS(KNP)
These are the codes you want to see.
Or, just look through the grille:
Just FYI...
That picture is good but it incorrectly labels the power steering fluid cooler as the engine oil cooler.
The engine oil cooler is actually inside the radiator on the drivers side. Just like the standard transmission cooler is internal to the radiator on the passenger side.
If you look under the hood you will see a line going to the top and one to the bottom of the radiator end tank on the drivers side if it has the engine oil cooler.
If it doesn't have any lines on the drivers side tank and only has lines on the passenger side tank then the truck is not equipped with the oil cooler from the factory.